JP2003098414A - Image stabilizer and optical equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] If a roller is screwed to a holding member for holding an optical element for shake correction and can be moved in a direction perpendicular to the optical axis, the number of parts increases, and the number of assembly steps and cost increase. I do. SOLUTION: In a shake correcting apparatus for correcting an image shake by moving an optical element 211 in a direction orthogonal to an optical axis, a holding member 210 holding the optical element, and a device arranged before and after the holding member in the optical axis direction. First and second base plates 160 and 170 constituting the main body are provided, and a plurality of extending portions 210g extending in a direction orthogonal to the optical axis are provided on the outer periphery of the holding member, and a slide integrally formed with the extending portions is provided. Contact surface 210d (210
e) is slidably abutted on the first and second ground planes or the member 165 fixed to at least one of these ground planes in the direction orthogonal to the optical axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake correction device for correcting image shake caused by shake applied to an optical device such as a camera or a lens barrel.

[0002]

2. Description of the Related Art Various shake correction devices have been conventionally proposed as a method for supporting a shake correction optical element so as to be movable in a direction orthogonal to the optical axis.

For example, in Japanese Patent Laid-Open No. 11-316399, there are three outer peripheral portions of a support frame for holding a shake correction lens.
There is proposed a configuration in which arms are radially extended in a direction, rollers are screwed to the tips of these arms, and the rollers are arranged in a slotted guide groove formed in a main plate.

The guide groove is an elongated hole extending in the direction around the optical axis, and the above-mentioned three rollers can move only in this direction. That is, the support frame is freely movable in all directions within the plane including the ground plane.

Further, in Japanese Patent Laid-Open No. 9-61881,
A pair of yokes are fixed to the front surface of the main plate so as to keep a predetermined gap, and a support frame holding a lens is sandwiched in the gap with a gap, and support balls are arranged at three positions on the support frame to support them. A structure has been proposed in which a sphere is biased by a charge spring to slidably contact each of the above-mentioned yokes.

[0006]

However, in the one proposed in Japanese Patent Application Laid-Open No. 11-316399, since the rollers are screwed to the support frame, the number of parts increases, and the number of assembling steps and the cost increase. There is. Also,
The optical performance may deteriorate due to the positional deviation of the rollers.

Further, in the one proposed in Japanese Unexamined Patent Publication No. 9-61881, since a pair of dedicated yokes are used, not only the number of parts increases, the number of assembling steps and the cost increase, but also the lens barrel Since the number of constituent parts between the base plate, which is a basic part, and the lens increases, there is a problem in that the support frame is tilted with respect to the optical axis and the optical performance is likely to deteriorate.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a shake correction device and an optical device which are less likely to cause deterioration in optical performance and which can be configured with a small number of parts and at a low cost.

[0009]

To achieve the above object, in the present invention, in a shake correcting apparatus for moving an optical element in a direction orthogonal to an optical axis to correct an image shake, a holding means for holding the optical element. A plurality of extending portions extending in the optical axis orthogonal direction on the outer periphery of the holding member, the member and first and second base plates that are arranged before and after the holding member in the optical axis direction and that constitute the apparatus main body are provided. And a member fixed to the first and second base plates or at least one of the base plates by a sliding contact surface integrally formed with the extending portion (for example, a coil for generating thrust force in the optical axis orthogonal direction of the holding member). Positioning plate made of non-magnetic material that is fixed to the ground plate for positioning in the optical axis direction)
Is slidably brought into contact with the optical axis.

As described above, the sliding contact surfaces are integrally formed before and after the extending portion provided on the holding member, and the sliding contact surfaces are formed on the first and second base plates or a member fixed to any one of the base plates. By supporting the holding member and the optical element so as to be slidably abuttable so as to be movable in the direction orthogonal to the optical axis, a deterioration of the optical performance is unlikely to occur, and a shake correction apparatus that can be configured with a small number of parts and at a low cost is provided. It can be realized.

Friction (sliding resistance) between the sliding contact surface and the first and second base plates or a member fixed to one of the base plates.
It is possible to form the sliding surface in the shape of a convex curved surface in order to reduce the noise. The holding member is adjusted by adjusting the amount of protrusion of the sliding surface (convex curved surface) and the amount of protrusion of the convex receiving surface that receives the contact of the sliding contact surface with at least one of the first and second base plates. It becomes possible to maintain the optical performance more easily by properly setting the backlash.

Then, in an optical apparatus (of a lens barrel portion thereof) equipped with such a shake correction device, when it has a guide member for guiding the lens unit movable in the optical axis direction in the optical axis direction, And a notch-shaped portion is formed in a portion corresponding to between the two extending portions of the holding member on the outer circumference of the second main plate, and the guide member cuts the cut portion when the lens unit moves in the optical axis direction. You may make it pass through the space formed between the notch-shaped part and the apparatus main body in the direction orthogonal to the optical axis.

Thus, it can be effectively used as a space formed between the notch-shaped portion not related to the support of the holding member and the device body, and a space required for the passage of the guide member. It is possible to reduce the size of the lens barrel part).

Further, in an optical apparatus equipped with the above-mentioned shake correction device, when it has an aperture limiting unit for limiting the opening aperture of the shutter unit for controlling the amount of passing light, this aperture limiting unit is used as the holding member. You may arrange | position between extension parts.

As a result, the space between the extending portions which is not used for the shake correction can be effectively used as the space for disposing the aperture limiting unit, and the optical device can be downsized.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) FIGS. 1 to 29
FIG. 1 shows the configuration of a lens barrel for a camera (optical device) equipped with the shake correction apparatus according to the first embodiment of the present invention.

(1) A lens barrel structure for holding and moving a lens group will be described with reference to FIGS. 1, 9, 10 and 11.

This lens barrel is a three-stage collapsible lens barrel provided with two so-called differential cam barrels. Reference numeral 101 is a fixed cylinder fixed to a camera body (not shown). This fixed cylinder 101
A female helicoid 101a is formed on the inner peripheral portion of the.

Reference numeral 120 denotes a first differential cam cylinder, and a male helicoid and a gear are formed so as to overlap each other on a rear end outer peripheral portion 120a.

Reference numeral 110 denotes a first linear guide cylinder which is slidably held in the inner peripheral portion of the first differential cam cylinder 120 only in the rotational direction. Reference numeral 104 denotes a long shaft gear whose rotary shaft is fixed to the fixed barrel 101, which meshes with the gear portion (see FIG. 9) of the rear end outer peripheral portion 120a of the first differential cam barrel 120. The long shaft gear 104 also meshes with a final gear (not shown) of the zoom gear unit 103.

The first linear guide cylinder 110 and the first differential cam cylinder 120 are relatively rotatably fixed. Less than,
The structure will be described. The protrusions 110d provided at four positions in the circumferential direction on the rear portion of the first straight-moving guide cylinder 110 have inner chamfered portions 120 of the first differential cam cylinder 120 during assembly.
After getting over c, it fits in the inner groove portion 120b. Further, the guide pin portion 110c of the first straight guide cylinder 110
Is fitted in a long groove (not shown) on the fixed barrel 101 parallel to the optical axis.

Therefore, the first rectilinear guide cylinder 110 is movable in the optical axis direction without rotating with respect to the fixed cylinder 101, and the first differential cam cylinder 120 is relatively relative to the first rectilinear cylinder. It is rotatable and can move integrally in the optical axis direction.

The second straight guide cylinder (lens barrel member) 13
The 0 and the second differential cam barrel 140 are rotatably fixed relative to each other, and are configured to move forward and backward in the optical axis direction with respect to the first linear guide barrel 110. The structure will be described below.

Reference numeral 145 is a drive ring, and the female screw portion 145a (at two locations in the circumferential direction) at the bent tip of the drive ring is fitted in the concave portion of the second differential cam barrel 140, and the drive pin 146 is placed from the outside.
Is integrally screwed and fixed to the second differential cam barrel 140.

The ring portion 130 of the second straight guide cylinder 130
A first rectilinear plate A131 and a second rectilinear plate B132 are screwed to the drive ring 145 so as to sandwich the drive ring 145 while maintaining a relatively rotatable gap. By this structure,
The second straight guide cylinder 130 and the second differential cam cylinder 140 are integrally movable in the optical axis direction and relatively rotatable. Four protrusions 13 formed on the second straight guide cylinder 130
0a is fitted in the long groove 110g of the first straight guide cylinder 110.

The two drive pins 146 provided on the second rectilinear guide cylinder 130 are formed in the lead cam groove A110e penetratingly formed on the first rectilinear guide cylinder 110 and the inner diameter portion of the first differential cam cylinder 120. It is fitted in a long groove 120d formed with a bottom and parallel to the optical axis.

The six pins 144 fixed to the rear portion of the second differential cam barrel 140 are fitted in the lead cam groove B110f of the inner diameter of the first rectilinear guide barrel 110.

Therefore, the second rectilinear guide cylinder 130 is not rotatable with respect to the first rectilinear guide cylinder 110 and can be moved back and forth in the optical axis direction. In addition, the second differential cam barrel 140 is
It rotates at the same rotation angle as the differential cam cylinder 110 and can move back and forth in the optical axis direction.

The first-group lens barrel 150 has first-group pins 151 embedded at three positions in the circumferential direction at the rear portion thereof. These first-group pins 151 are provided in the inner diameter of the second differential cam barrel 140. It is fitted into the bottomed first-group cam groove 140a.
Further, in the upper long groove 150a and the lower long groove 150b provided above and below the inside of the first group lens barrel 150, the upper key portion 130c and the lower key portion 130d of the second rectilinear guide barrel 130 are provided.
The width part of is fitted. Therefore, the first group lens barrel 1
The reference numeral 50 is non-rotatable with respect to the second linear guide cylinder 130 and can move back and forth in the optical axis direction.

Three second group pin portions 180b are arranged on the outer peripheral portion of the second group lens holder 180 holding the second group lens group 181, and these two group pin portions 180b are connected to the second differential cam. It is fitted in a bottomed second group cam groove 140b formed inside the tube 140.

The two protrusions 180a provided above and below the second lens holder 180 are provided in the second straight guide cylinder 130.
Are fitted in long grooves 130e formed above and below.

Reference numeral 133 is a second flare cut sheet, which is screwed to the back surface of the ring portion 130b of the second straight guide cylinder 130.

(2) Driving of each cylinder by rotation of the motor 102 will be described with reference to FIGS. 1, 9, 10 and 11.

When the rotational driving force from the motor 102 is applied to the first differential cam barrel 120, the first differential cam barrel 120 is rotated by the helicoid coupling with the female helicoid 101a of the fixed barrel 101 while rotating. Move forward and backward. At this time, the rotation of the first straight guide cylinder 110 is fixed to the fixed cylinder 101.
The first differential cam barrel 120 does not rotate integrally with the first differential cam barrel 120, but moves back and forth in the optical axis direction.

The second differential cam barrel 140 at the next stage has a drive pin 146 fitted in the lead cam groove A110e of the first straight guide cylinder 110 and the long groove 120d of the first differential cam barrel 120.
Of the first differential cam barrel 120, it moves back and forth relatively in the optical axis direction at the same rotation angle. At this time, the second
The straight guide cylinder 130 rotates its rotation to the first straight guide cylinder 11
Since it is configured to be blocked by 0, it does not rotate integrally with the second differential cam barrel 140 but moves forward and backward in the optical axis direction.

The first group lens barrel 150 has a first group pin 1 fitted in the first group cam groove 140a of the second differential cam barrel 140.
51 and the upper key portion 130c of the second straight guide cylinder 130
1 group lens barrel 1 in which the lower key portion 130d is fitted with
The upper long groove 150a and the lower long groove 150b of 50 move forward and backward in the optical axis direction without rotating.

The second lens holder 180 has a second group pin portion 180b fitted in the second group cam groove 140b of the second differential cam barrel 140 and a long groove 130e formed above and below the second rectilinear guide barrel 130. By the action of the protrusion 180a fitted to the, it moves back and forth in the optical axis direction without rotating.

(3) The operation from the retracted state shown in FIGS. 2 and 5 to the wide standby state shown in FIGS. 3 and 6 will be described with reference to FIGS.

When the user turns on the power switch (not shown) of the camera, the control circuit (not shown) of the camera drives the motor 102. When the rotational driving force from the motor 102 is applied to the first differential cam barrel 120, the first differential cam barrel 120 is rotated in the optical axis direction by helicoid coupling with the female helicoid 101a of the fixed barrel 101. Be done. The drive pin 146 of the second differential cam barrel 140 is
The lead cam groove A110e (see FIG. 13) moves from 110e1 to 110e2 to move the first straight guide cylinder 110.
On the other hand, the second differential cam barrel 140 has the lead cam groove A110.
It is delivered by the amount of the e1 part and the 110e2 part in the optical axis direction.

First group pin 151 of first group lens barrel 150
Is from 140a1 part of the first group cam groove 140a to 140a2
Then, the first group lens barrel 150 is extended relative to the second differential cam barrel 140 by an amount corresponding to the optical axis direction of 140a1 and 140a2 of the cam. The second group pin portion 180b of the second group lens holder 180 has a second group cam groove 140b.
No. 140b1 to 140b2, and the second lens group 181 is retracted into the second differential cam barrel 140 by the amount of the cam 140b1 and 140b2 in the optical axis direction. As a result of the above-mentioned extension, the retracted state is extended to the wide standby state.

(4) Focusing in wide angle will be described with reference to FIGS. When the photographer presses the release button (not shown) on the camera to perform the shooting operation,
The control circuit of the camera drives the motor 102 to adjust the focus according to the distance to the subject. When the rotational driving force from the motor 102 is applied to the first differential cam barrel 120, the first differential cam barrel 120 is further extended by the helicoid action. At this time, the drive pin 146 moves to the position of the lead cam groove A110e corresponding to the rotation amount of the motor 102.
Stop from 0e3 copy (infinity position) to 110e4 copy (close-up position) to obtain a focus.

Further, the first group pin 1 of the first group lens barrel 150
Reference numeral 51 indicates a portion 140a3 of the first group cam groove 140a
The second group pin portion 180b of the second lens group holder 180 is moved to a position for obtaining a focus up to the a4 portion, and the second group pin 180b for obtaining a focus between the 140b3 portion and the 140b4 portion of the second group cam groove 140b. Move to position.

By the above extension, the first group lens barrel 1
The first lens group fixed to 50 and the second lens group 181 fixed to the second lens group holder 180 move in the optical axis direction, and the focus adjustment is performed according to the subject from infinity to the closest distance. Then, subsequently, the film (not shown) is exposed by opening and closing the shutter.

When the exposure is completed, the control circuit controls the motor 10
2 is rotated in the reverse direction, the lens barrel is retracted to the wide standby position, and one frame of film is further wound.

(5) Wide-to-tele zooming will be described with reference to FIGS. 3, 4, 6, 7, and 12 to 15.

When the photographer operates the zoom switch (not shown) of the camera in the tele position, the control circuit of the camera drives the motor 102. The motor 10 is attached to the first differential cam barrel 120.
When the rotational driving force from 2 is applied, the first differential cam barrel 1
20 is fed in the optical axis direction while rotating by the helicoid coupling with the female helicoid 101a of the fixed barrel 101. At this time, the drive pin 146 of the second differential cam barrel 140
Moves to the 110e18 portion of the lead cam groove A110e, and the 1st group pin 151 of the 1st group lens barrel 150 becomes 140
a Move to 18 and move to the 2nd group lens holder 180
The group pin portion 180b is 140b1 of the second group cam groove 140b.
Move up to 8. By the above-mentioned feeding, the tele-standby state shown in FIGS. 4 and 7 is fed.

(6) Focusing in the telephoto state will be described with reference to FIGS. When the photographer presses the release button of the camera to perform a photographing operation, the control circuit of the camera drives the motor 102 to adjust the focus according to the distance to the subject. First differential cam barrel 12
When the rotational driving force from the motor 102 is applied to 0, the first differential cam barrel 120 is further extended by the helicoid, and the drive pin 146 of the second differential cam barrel 140 is moved according to the rotation amount of the motor 102. 11 of lead cam groove A110e
Stop from 0e19 copy (infinity position) to 110e20 copy (close-up position) to obtain a focus.

Further, the first group pin 1 of the first group lens barrel 150
Reference numeral 51 indicates the first group cam groove 140a
0a to the position for obtaining the in-focus between 20 parts, the second group pin portion 180b of the second group lens holder 180 moves to 2
The group cam groove 140b is moved to a position for obtaining a focus from a portion 140b19 to a portion 140b20 of the group cam groove 140b.

By the above extension, the first group lens barrel 1
The first lens group fixed to 50 and the second lens group 181 fixed to the second lens group holder 180 move in the optical axis direction, and focus adjustment is performed according to the subject from infinity to the closest distance. Then, subsequently, the film is exposed by opening and closing the shutter.

When the exposure is completed, the control circuit controls the motor 10
2 is rotated in the reverse direction, the lens barrel is retracted to the tele-standby position, and one frame of film is further wound.

The tele range of each cam (the range from 110e18 to 110e21 in the lead cam groove A110e and 140a in the first group cam groove 140a).
(Corresponding to the range from 18 to 140a21)),
The cam tilt is smaller than the other cam parts.

(7) The structure of the flare cut plate will be described with reference to FIGS. 9 and 11. Reference numeral 111 is a first flare cutting plate for cutting harmful light outside the photographing optical path. At the center of the inner peripheral portion of the first flare cutting plate 111, an opening 111a for passing necessary photographing light is formed. Further, the rear end flange portion 110 of the first straight guide cylinder 110 is provided on the outer peripheral portion of the first flare cut plate 111.
A plurality of engaging portions 111b that are engaged with the engaged portion 110b formed in a are formed. With this configuration, the first
The flare cut plate 111 moves back and forth in the optical axis direction integrally with the first straight guide cylinder 110.

Next, the structure of the first group unit 152 will be described. The first group unit 152 includes a shake correction device,
It includes a shutter unit and an aperture limiting unit that limits the aperture when wide. The shake correction device, shutter unit, and aperture limiting unit will be described later.

(8) Structure of coil 164 FIG.
Will be explained. Reference numeral 163 denotes two non-conductor terminals, and two metal terminal pins 162 are fitted to one terminal 163. Each of these terminals 163 has an elongated hole portion 1 of the coil 164.
It is adhesively fixed to the center of 64a.

The two lead wire portions 164b of the coil 163 are soldered to the terminal pins 162, respectively. Further, the terminal pin 162 is passed through the hole 190a of the flexible printed board 190 and soldered. As a result, the coil 164 is electrically connected to the flexible printed board 190.

(9) Parts attached to the base A (second base plate) 160 will be described with reference to FIGS. 20 and 22.

The attraction plate 161 made of a magnetic material has a hole 1
Base A160 located at the tip of the first group unit at 61a
Through the rib portion 160b1 of the base A160
It is adhesively fixed to 60a. Then, in the rib portion 160b1, the elongated hole portion 1 of the unitized coil 164 described above is formed.
64a is fitted. Further, the positioning plate 165 which is a non-magnetic material has positioning holes 165a and 165b.
To the positioning pin portions 160t, 160 of the base A160.
It is adhesively fixed to the base A 160 by fitting d.

In this state, the coil 164 has the base A
There is looseness due to the gap between the recess 160a of 160 and the positioning plate 165, and the position in the optical axis direction is not fixed.
Therefore, each of the two coils 164 is pressed against the positioning plate 165, the coil 164 is adhesively fixed to the positioning plate 165, and the coil 164 is positioned in the optical axis direction.

Above and below the base A 160, an upper key portion 130c and a lower key portion 130d of the second straight guide cylinder 130 are provided.
In order for the and to pass, a relief shape portion (notch shape portion) is formed such that the upper and lower sides of the annular shape are cut by flat surfaces.

Next, parts to be attached to the base B (first base plate) 170 will be described with reference to FIGS.

A shutter actuator unit 171 is fixed to the base B 170 with screws 178.
In the hole 172a formed in the shutter blade A172 and the hole 174a formed in the shutter blade C174,
Boss A171a of the shutter actuator unit
Are fitted to each other, and the long hole portion 172 formed in the shutter blade A is
The arm portion 171c of the shutter actuator unit 171 is fitted in the elongated holes 174b formed in the shutter blade C and the shutter blade C.

Further, in the hole 173a formed in the shutter blade B173, the boss B170 of the base B171 is formed.
The shutter actuator unit 1 is attached to the long hole portion 173b formed in the shutter blade B173.
The arm portion 171c of 71 is fitted. The 1C holder 220 has a shutter PI (photo interrupter).
222 is adhesively fixed, and this 1C holder 220 has 2
It is fixed to the base B 170 by a book screw 223.

As shown in FIG. 19, the shutter spring 17
9, the coil portion and one end portion are hooked on the boss portions 220a and 220b of the 1C holder 220, and the other end portion is the arm portion 171 of the shutter actuator unit 171.
hanging on c. This allows the shutter spring 179
Generates a force to close the shutter. 1C
A 1C lens 221 is adhesively fixed to the rear portion of the holder 220.

The upper and lower parts of the base B 170 are the upper key part 130c and the lower key part 1 of the second straight guide cylinder 130.
Since 30d passes, it is formed in a relief shape as if the upper and lower sides of the annular shape were cut by flat surfaces.

(10) The structure and operation of the aperture limiting lever 175 will be described with reference to FIGS. 6, 7, 19 and 20.

In the wide-angle mode, the aperture limiting lever 175 is fixed to the base B170 by a shaft 176 so as to be rotatable by a predetermined angle in order to limit the aperture size of the shutter to a smaller value than in other focal lengths.

The position of the aperture limiting lever 175 as viewed from the front of the lens barrel is determined by the three arm portions (extension portions) 2 of the 1B holder 210.
Of the 10 g, it is between the left arm and the lower right arm, and the position of the aperture limiting lever 175 in the optical axis direction is 1B holder 210.
Is almost equal to.

As shown in FIG. 19, the aperture limiting spring 177 is used.
The coil portion and one end portion thereof are hooked on the boss portions 220c and 220d on the 1C holder 220, and the tip end portion is hooked on the opening limiting lever 175. This aperture limiting spring 177 normally causes shutter blades A172, B173, C
174 can be fully opened.

As shown in FIG. 7, in the telescopic state, the blocking portion 175b of the opening limiting lever 175 is provided with the opening limiting spring 17
7 by shutter blades A172, B173, C17
Since it is retracted from the opening / closing operation surface of No. 4, the shutter blades A172, B17 are moved by the shutter actuator.
3, C174 can be fully opened.

When the wide state shown in FIG. 6 is obtained by zooming, the lower key portion 130 of the second rectilinear guide cylinder 130.
When d pushes up the tip of the aperture limiting lever 175, the lever 175 rotates, and the blocking portion 175b enters the opening / closing surface of the shutter blade. When the shutter operation is performed in this state, the stopper portion 172c of the shutter blade A172 is blocked by the blocking portion 1 of the opening limiting lever 175.
The shutter cannot be fully opened by hitting 75b. The small opening diameter formed at this time is the wide maximum opening diameter by design.

(11) The construction and assembly of the 1B holder 210 will be described with reference to FIGS.

As shown in FIGS. 20 and 21, in the circumferential direction 2 of a substantially cylindrical portion (hereinafter referred to as a cylindrical portion) surrounding the outer periphery of the 1B lens group 211 in the 1B holder 210.
At the location, the receiving portion 210a is projected so as to project outward in the radial direction.
The yoke plate 212 and the magnet 213 are overlapped and adhered and fixed to the receiving portions 210a, respectively.

As shown in FIG. 26, the 1B holder 210
U-grooves 210b parallel to the optical axis for hooking one end of the spring 214 are formed at three locations in the circumferential direction of the cylindrical portion (three locations other than the two locations where the receiving portions 210a are formed). The recess 21 formed on the front side of the 1B holder 210
A part of 0f is connected to the U groove 210b. U
A convex portion 210c protruding toward the center of the optical axis is formed in the middle of the groove portion 210b.

The front convex spherical surface portion (sliding surface) 210d is 1B.
The arm portion 2 extending outward from the cylindrical portion of the holder 210 in the radial direction (direction orthogonal to the optical axis) and having an L shape when viewed in the direction orthogonal to the optical axis.
It is integrally formed with the arm 210g so as to be positioned on the front side of the spring 214 on the front surface of 10g. The arm portion 210g having an L-shaped section has a coil portion 21 of the spring 214.
4b is formed so as to surround the front side and one side surface.

The rear convex spherical surface portion (sliding surface) 210e
The arm portion 2 is positioned so as to be positioned slightly obliquely rearward of the spring 214 on the rear surface of the arm portion 210g of the 1B holder 210.
It is formed integrally with 10 g.

As described above, the 1B holder 210 has the L-shaped arm portion 210g surrounding a part of the spring 214,
A front convex spherical surface portion 210d and a rear convex spherical surface portion 210e are formed on the arm portion 210g and before and after the spring 214. An imaginary straight line connecting each front convex sphere 210d and each coil 214b of each spring 214 is parallel to the optical axis of the 1B lens group 211.

Further, the three springs 214 are attached to the 1B holder 210 by inserting the L-shaped hook portion 214c, which is one end thereof, between the bottom surface of the U groove portion 210b of the 1B holder 210 and the lower surface of the convex portion 210c. It is connected. The convex portion 210c is arranged on an extension line of the spring 214 in the expansion / contraction direction.

Further, the L-shaped hook portion 214 of the spring 214 is used.
The key part 214d formed by bending the tip of c is 1
The spring 214 engages with the recess 210f of the B holder 210.
Prevents it from coming off the base B210.

Further, the eccentricity adjusting pin 21 is attached to the other end ring portion 214a of the two springs 214 of the three springs 214.
5 crank parts 215c are inserted. In the eccentricity adjustment pin 215, the fitting portion A215b on the front side thereof is the base A1.
Fitted in the hole 160c of 60, the rear fitting portion B215d
Fits into the hole 170b of the base B170.

The other end ring portion 214a of the remaining one spring 214 has a base A160 as shown in FIG.
It is hung on a boss portion 160e formed integrally with the.

As a result, the 1B holder 210 is in a suspended state in which it is pulled radially outward by the three springs 214.

The above-mentioned unitized base A160
The positioning pin portions 160t and 160d projecting through the positioning plate 165 incorporated in the base are mounted on the base B17.
The positioning holes 170i formed above and below the zero receiving plane 170h are fitted, and the two screws 166 are used to attach the base A160.
And the base B170 are fixed by screws.

As a result, the receiving plane 1 of the base B170
70h is covered with the positioning plate 165, and the arm 210g of the 1B holder 210 has some play in the optical axis direction in the step space between the receiving plane 170h of the base B170 and the three convex receiving planes 170c of the base B170. The base A 160 and the base B 170 are fixed to each other by two screws 166.
Due to this incorporation, the positioning plate 165 becomes the base A16.
It is in a state of being sandwiched between 0 and the base B170.

The front convex spherical surface portions 210d at the three positions of the 1B holder 210 slidably contact the flat surface portion of the positioning plate 165, and the rear convex spherical surface portions 210e at the three positions of the 1B holder 210 are connected to the base B170. It slidably contacts the convex receiving flat surfaces 170c formed at the three upper positions.

The positioning plate 165 is used for the 1B holder 210.
It also serves as a separating plate that does not directly contact the magnet 213 fixed to the coil 164 with the coil 164.

In this embodiment, the 1B holder 21
The case where the front convex spherical surface portion 210d of 0 is slidably brought into contact with the positioning plate 165 has been described, but the positioning plate 165 is made small so that the front convex spherical surface portion can slide on the convex receiving plane formed on the base A. You may make it contact with.

In general, since the base B170 is made by resin molding using a mold, by adjusting the height of the mold part forming the convex receiving plane 170c on the base B170, the 1B holder 210 in the optical axis direction. It is possible to secure the optical performance by arbitrarily setting the backlash.

As shown in FIG. 3, the relief shape portions on the upper side of the base A 160 and the base B 170 are formed by the 1B holder 210.
The three arm portions 210g are formed correspondingly between the left arm portion and the upper right arm portion. At the time of zooming and focusing, the relief shape portion and the first group lens barrel 150
The upper key portion 130c of the second rectilinear guide tube 130 passes through the space between and in the direction orthogonal to the optical axis. In addition, the relief shape portion on the lower side of the base A160 and the base B170 is 1B.
Of the three arm portions 210g of the holder 210, they are formed correspondingly between the upper right arm portion and the lower right arm portion. At the time of zooming and focusing, a space in the direction perpendicular to the optical axis between the escape shape portion and the first group lens barrel 150,
The lower key portion 130d of the second straight guide cylinder 130 passes through.

(12) The operation of the 1B holder 210 arranged between the base A 160 and the base B 170 and movable in the plane orthogonal to the optical axis will be described with reference to FIGS. 20 and 23.

The 1B holder 210 includes two magnets 213 fixed on the 1B holder 210 and a base A1.
The two coils 164 fixed to 60 receive thrust by mutual magnetic force and are driven. Coil 1 arranged 45 degrees to the upper left from the optical axis when viewed from the front of the lens barrel
When 64 is energized in the positive direction, the magnets arranged in the upper left 45 degree direction receive a force in the upper left 45 degree direction and the 1B holder 2
10 receives thrust in the upper left direction of 45 degrees. At this time, 1B
Of the three springs 214 that suspend the holder 210, the extended spring tries to pull back the 1B holder 210 toward the center side where the optical axis is located. The 1B holder 210 stops at a position where the thrust force in the upper left direction of 45 degrees and the pullback force of the spring 214 are balanced.

When the coil 164 arranged in the upper left direction of 45 degrees is energized in the opposite direction, the 1B holder 210
Is the magnet 213 and the coil 1 in the lower left 45 degree direction.
It stops at a position where the thrust force generated by 64 and the pulling back force of the extended spring 214 are balanced.

Similarly, as viewed from the front of the lens barrel, when the coil 164 arranged in the lower left 45 ° direction from the optical axis is energized in the positive direction, the 1B holder 210 moves the magnet 213 and the coil 164 in the upper right 45 ° direction. It stops at a position where the thrust generated by the force and the pulling back force of the extended spring 214 are balanced. Further, when the coil 164 arranged in the lower left 45 ° direction is energized in the opposite direction, the 1B holder 210
Is the magnet 213 and the coil 1 in the upper right 45 degree direction.
It stops at a position where the thrust force generated by 64 and the pulling back force of the extended spring 214 are balanced.

Then, by passing a current of an arbitrary magnitude in an arbitrary direction through the two coils 164 arranged with a phase shift of 90 degrees from each other, the 1B holder 210 is moved from the optical axis in a plane orthogonal to the optical axis. It can be driven to any position.

(13) The structure and assembly of the 1A holder 200 will be described with reference to FIG.

The 1A holder 200 is a 1A lens group 201.
Hold. Wedge-shaped bayonet male portions 200a are provided at three locations on the outer periphery of the 1A holder 200.

This 1A holder 200 is used as a base A160
1A holder 200 bayonet male part 200a to the base A160 bayonet female part 16
Align 1A holder 200 with base 0g
Fit into 160 and rotate several degrees to rotate bayonet male part 2
00a bites into the bayonet female portion 160g, so that the 1A holder 200 can be attached to the base A1 without play.
It can be fixed at 60.

Since the bayonet male portion 200a and the bayonet female portion 160g are arranged at equal intervals of 120 degrees in the circumferential direction, the 1A holder 200 can select the rotation position for each 120 degrees when it is assembled into the base A160.

(14) Adjustment of the 1B holder 210 will be described with reference to FIGS. 20 and 26.

The 1B holder 210 has three springs 214.
1B lens group 211 is
The optical axis is easily displaced from the A lens group 201 and the 1C lens 221. So, a flat-blade screwdriver (screwdriver)
Is engaged with the slit portion 215a of the eccentricity adjustment pin 215 through the hole 160c of the base A160, and the eccentricity adjustment pin 215 is rotated, thereby changing the tension of the two springs 214 and the 1B lens group 211. The optical axis of 1 is matched with the optical axis of the 1A lens group 201 and the 1C lens 221. Then, an adhesive is applied to the hole 160c of the base A 160 to fix the eccentricity adjusting pin 215.

(15) The eccentricity adjustment of the first group unit 152 will be described with reference to FIGS. 28 and 29.

In the lens barrel of the present embodiment, the first-group unit 152 is made parallel by decentering in the plane orthogonal to the optical axis, so that the second group
The first lens group (that is, the 1A lens group 201, the 1B lens groups 211 and 1 with respect to the optical axis of the lens group 181)
The lens performance can be improved by adjusting the optical axis position of the C lens 221).

Here, the eccentricity adjusting mechanism of the first group unit is
This will be described with reference to FIG. The leaf spring A230 is in contact with the front surface of the first group lens barrel 150, and the screw portion 2 of the screw 232 for fixing the leaf spring A230 to the front surface of the first group lens barrel 150.
32a passes through the hole 230c of the leaf spring A230 and the escape hole 150c of the first group lens barrel 150 and passes through the base A16.
It is screwed into the female thread portion 160h of 0. At the time of this screwing, the step portion 232b of the screw 232 hits the flat surface portion 160q of the base A 160, and the screwing amount is defined.

In this state, the end portion 23 of the leaf spring A230 is
0a and 230b are the stepped portions 15 of the first-group lens barrel 150.
0f, 150h, and the middle part of the leaf spring A230,
It abuts on the convex portion 150g of the first group lens barrel 150.

Further, the head portion 232c of the screw 232 is arranged around the hole portion 230c of the leaf spring A230 in the first lens group barrel 15.
It is bent in a direction approaching the 0 recessed portion 150e. Similarly, the screw 233 is also screwed into the female screw portion 160i of the base A 160 while bending around the hole portion 230d of the leaf spring 230.

Like the leaf spring A230, the leaf spring B231
Also, with the screws 234 and 235 bent around the holes 231c and 231d of the leaf spring B231, the base A
It is screwed to 160.

The leaf spring A generated by the above deflection
By the elastic force of 230 and the leaf spring B231, the first group unit 152 including the base A160 is moved to the first group lens barrel 1.
It is pressed against the front surface portion 150v of 50. The pressure contact surfaces of the first group unit 152 are flat surface portions 160q, 160r, 160s formed at three circumferential positions of the base A 160.

The first group eccentricity adjusting pin A236 has its head portion 2
36b is fitted in the stepped hole portion 150p of the first group lens barrel 150, and the pin tip portion 236a is fitted in the elongated hole portion 160l of the base A 160.

Similarly, the head 237b of the first group eccentricity adjusting pin B237 has a stepped hole portion 1 of the first group lens barrel 150.
50q, the pin tip 137a is a base A160
It is fitted in the hole portion 160m.

(16) The eccentricity adjustment operation of the first group unit 152 will be described. When the first group eccentricity adjustment pin B237 is rotated to the left or right within 90 degrees, the first group eccentricity adjustment pin B237
237a of the first group rotates coaxially with the stepped hole section 150q of the first group lens barrel 150, and the first group eccentricity adjustment pin B237.
160m hole of the base A160 where the tip of the
Moves to the same position as the front end portion 237a of the first group eccentricity adjustment pin B237 in the plane orthogonal to the optical axis.

On the other hand, the long hole 160l of the base A160
The first group eccentricity adjusting pin A236 that is not rotated is prevented from moving in the groove width direction by the tip end portion 236a, and is movable only in the groove longitudinal direction. With this structure, 1
The optical axis of the group unit 152 is adjusted approximately in the x direction (lateral direction).

Next, if the first group eccentricity adjustment pin A236 is rotated within 90 degrees to the left and right without rotating the first group eccentricity adjustment pin B237, the first group unit 152 will turn to the base A16.
It rotates around the hole 160k of 0. At this time, 1
The optical axis of the group unit 152 is adjusted approximately in the y direction (vertical direction).

As described above, the first group eccentricity adjustment pin A236
By adjusting the amount of rotation of the first group eccentricity adjustment pin B237 and the amount of rotation of the first group eccentricity adjustment pin B237, the optical axis of the first group unit 152 can be moved in the xy plane orthogonal to the optical axis. At this time, the action of the leaf spring A230 and the leaf spring B231 described above causes 1
The group unit 152 is the front portion 15 of the first group lens barrel 150.
The optical axis of the first group unit 150 does not tilt because it slides while being pressed against 0v.

The notch portions 236c and 237c of the first group eccentricity adjustment pins A236 and B237 are the first group eccentricity adjustment pin A2.
36, B237, and the positions of the tip portions 236a and 237a of the B237, and serve as a guide for the amount of eccentricity when adjusting the eccentricity of the first group unit 152.

(17) A method of fixing the first group unit 152 to the first group lens barrel 150 will be described.

The protrusion 160n of the base A160 is inserted into the escape hole 150r of the first lens barrel 150.
The shape of the escape hole portion 150r is a
It has a shape that does not interfere with.

Similarly, the protrusion 160p of the base A160
Is also inserted into the escape hole portion 150s of the first group lens barrel 150, and the escape hole portion 150s also has the projection 160 when the eccentricity is adjusted.
The shape does not interfere with p.

The first group eccentricity adjusting pins A236 and B2 described above.
When the first group eccentricity adjustment by 37 is completed, the base A160
Projection 160n and the escape hole 15 of the first-group lens barrel 150
Gap between 0r, protrusion 160p and escape hole 150s
The first-group unit 152 is fixed to the first-group lens barrel 150 by applying an adhesive in the gap between

Next, the isolation sheet 238 is incorporated into the first group lens barrel 150 so as to overlap the first group adjusting leaf spring A230 and the leaf spring B231.
50u is the rotation center hole portion 242a of the barrier blade A242 and the barrier blade B2 of the barrier unit 240 shown in FIG.
It is fitted into the rotation center hole portion 243a of 43. Accordingly, the barrier unit 240 is arranged so as to overlap the isolation sheet 238.

(Second Embodiment) FIG. 30 shows a first embodiment of a shake correcting apparatus mounted on a camera according to the second embodiment of the present invention.
The structure of the B holder 610 is shown. 1B holder 6
10, receiving portions 610a are formed so as to project radially outward at two locations in the circumferential direction of the cylindrical portion along the outer circumference of the 1B lens group 611. The yoke plate 612 and the magnet 613 are formed in these receiving portions 610a. And are piled up and fixed by adhesion.

U-grooves 610b parallel to the optical axis for hooking one end of the spring 614 are provided at three circumferential locations (three locations other than the two locations where the receiving portions 610a are formed) of the cylindrical portion of the 1B holder 610. Are formed. 1B holder 6
A part of the recess 610f formed on the front side of 10 is connected to the U groove 610b.

The front convex spherical surface portion (sliding surface) 610d is 1B.
The L-shaped arm portion 6 extending outward from the cylindrical portion of the holder 610 in the radial direction (direction orthogonal to the optical axis) and viewed in the direction orthogonal to the optical axis.
It is integrally formed with the arm portion 610g so as to be located on the front side of the spring 614 on the front surface of 10g. The arm portion 610g having an L-shaped section has a coil portion 61 of the spring 614.
4b is formed so as to surround the front side and one side surface.

The rear convex spherical surface portion (sliding surface) 610e
The arm portion 6 is positioned so as to be positioned slightly obliquely rearward of the spring 614 on the rear surface of the arm portion 610g of the 1B holder 610.
It is formed integrally with 10 g.

As described above, the 1B holder 610 has the L-shaped arm portion 610g surrounding a part of the spring 614,
A front convex spherical surface portion 610d and a rear convex spherical surface portion 610e are formed on the arm portion 610g and before and after the spring 614. An imaginary straight line connecting each front convex sphere 610d and the coil 614b of each spring 614 is parallel to the optical axis of the 1B lens group 611.

Further, in the three springs 614, the convex portion 614e of the L-shaped hook portion 614c, which is one end thereof, is sandwiched between the bottom surface and the ceiling surface of the U groove portion 610b of the 1B holder 610, and thus the 1B holder 610. Are linked to. The convex portion 614e is arranged on an extension line of the expansion and contraction direction of the spring 614.

Further, the L-shaped hook portion 614 of the spring 614 is used.
The key part 614d formed by bending the tip of c is 1
The spring 614 engages with the recess 610f of the B holder 610.
To prevent it from coming off the base B610.

The eccentricity adjusting pin 61 is attached to the other end ring portion 614a of the two springs 614 out of the three springs 614.
5 crank part 615c is inserted.

Although not shown, the remaining one spring 6
The other end ring portion of 14 is hooked on a boss portion formed integrally with the base A.

As a result, the 1B holder 610 is in a suspended state of being pulled radially outward by the three springs 614.

The front convex spherical surface portions 610d at the three positions of the 1B holder 610 slidably contact the flat surface portion of the positioning plate 165 described in the first embodiment, and are located at the three positions of the 1B holder 610. The rear convex spherical surface portion 610e slidably contacts the convex receiving flat surfaces 170c formed at three locations on the base B 170 described in the first embodiment.

(Third Embodiment) FIG. 31 shows a first embodiment of a shake correction apparatus mounted on a camera according to the third embodiment of the present invention.
The figure which looked at the structure of the B holder 710 from the back side is shown.

Receiving portions 710a are formed so as to project radially outward at two locations in the circumferential direction of the cylindrical portion along the outer circumference of the 1B lens group 711 in the 1B holder 710, and these receiving portions 710a have yokes. Plate 712 and magnet 7
13 and 13 are overlapped and fixed by adhesion.

At the three circumferential positions (three positions other than the two positions where the receiving portions 710a are formed) of the cylindrical portion of the 1B holder 710, there is a shape surrounding one end of the spring 714 in the radial direction (light Arm part 71 extending outward (in the direction orthogonal to the axis)
0 g is formed.

A rear convex surface portion 610e is formed integrally with the arm portion 710g on the back surface of the arm portion 710g. Although not shown, a front convex portion is integrally formed with the arm 710g on the front surface of the arm 710g.

The front convex surface portion slidably contacts the flat surface portion of the positioning plate 165 described in the first embodiment, and the rear convex surface portion 710e is the base B1 described in the first embodiment.
Sliding contact is made with the convex receiving planes 170c formed at three locations on the 70.

The virtual straight line connecting the front convex surface portion, the spring 714 and the rear convex surface portion 710e is parallel to the optical axis of the 1B lens group 711.

Also, the arm portion 7 surrounding the spring 714.
The hole formed in 10 g (that is, the hole into which the spring 714 is inserted) has such a size that the spring 714 and the arm 710 g do not interfere with each other even if the 1B holder 710 slides in the plane orthogonal to the optical axis. It is set.

One end of the spring 714 has a 1B holder 710.
The other end ring portion is hooked on the eccentricity adjustment pin 715. Both ends of the eccentricity adjustment pin 715 are fitted in the holes formed in the base A 160 and the base B 170 described in the first embodiment, and by rotating the eccentricity adjustment pin 715, The optical axis of the 1B lens group 711 can be adjusted by adjusting the tension.

In each of the above-described embodiments, the shake correction device in the lens barrel integrally provided in the camera has been described, but the present invention is the shake provided in the interchangeable lens barrel detachably mountable to the single-lens reflex camera. It can also be applied to a correction device.

[0139]

As described above, according to the present invention,
A sliding contact surface having a convex curved surface shape or the like is integrally formed before and after the extending portion provided on the holding member, and the sliding contact surface is formed into the first and second sliding contact surfaces.
Since the holding member and the optical element are slidably brought into contact with the base plate or the member fixed to one of the base plates so as to be movable in the direction orthogonal to the optical axis, deterioration of optical performance is unlikely to occur. Therefore, it is possible to realize a shake correction device that is small in size and low in cost with a small number of components.

[Brief description of drawings]

FIG. 1 is a perspective view (partially cutaway view) of a lens barrel of a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a retracted state of the lens barrel.

FIG. 3 is a perspective view showing a wide state of the lens barrel.

FIG. 4 is a perspective view showing a telescopic state of the lens barrel.

FIG. 5 is a cross-sectional view showing a retracted state of the lens barrel.

FIG. 6 is a cross-sectional view showing a wide state of the lens barrel.

FIG. 7 is a cross-sectional view showing a telephoto state of the lens barrel.

FIG. 8 is an exploded perspective view showing a component configuration of the lens barrel.

9 is a partially enlarged view of FIG.

FIG. 10 is a partially enlarged view of FIG.

FIG. 11 is an exploded perspective view of the components of the lens barrel as seen from the rear.

FIG. 12 is a development view of a fixed barrel that constitutes the lens barrel.

FIG. 13 is a development view of a first straight guide cylinder that constitutes the lens barrel.

FIG. 14 is a development view of a second differential cam barrel that constitutes the lens barrel.

FIG. 15 is an explanatory diagram of a cam locus of each lens group on the second differential cam barrel.

FIG. 16 is an explanatory diagram of a flexible printed circuit board (FPC) when the lens barrel is in a wide state.

FIG. 17 is an explanatory diagram of a flexible printed circuit board when the lens barrel is in a telescopic state.

FIG. 18 is an explanatory diagram of a flexible printed circuit board around the first group unit that constitutes the lens barrel.

FIG. 19 is an explanatory diagram of a flexible printed board behind the first group unit.

FIG. 20 is an exploded perspective view of the first group unit.

FIG. 21 is a partially enlarged view of FIG. 20.

FIG. 22 is an exploded perspective view of the first group unit seen from the rear of the camera.

FIG. 23 is a perspective view of a shake correction device mounted on the lens barrel.

FIG. 24 is a perspective view of the shake correction apparatus.

FIG. 25 is a perspective view of the shake correction apparatus.

FIG. 26 is a cross-sectional view of a 1B holder that constitutes the shake correction apparatus.

FIG. 27 is a rear perspective view of the 1B holder.

FIG. 28 is a configuration diagram of an eccentricity adjustment mechanism of the first group unit.

FIG. 29 is a configuration diagram of a barrier mechanism in the lens barrel.

FIG. 30 is a cross-sectional view of a 1B holder that constitutes a shake correction device mounted on the lens barrel of the camera of the second embodiment of the present invention.

FIG. 31 is a rear perspective view of a 1B holder that constitutes a shake correction device mounted on a lens barrel of a camera of a third embodiment of the present invention.

[Explanation of symbols]

101 Fixed tube 102 motor 103 Zoom gear unit 104 long shaft gear 110 First straight guide tube 111 First flare cut plate 120 First differential cam barrel 130 Second straight guide tube 131 Second straight plate A 132 Second straight plate B 133 2nd flare cut sheet 140 Second differential cam barrel 145 drive ring 146 drive pin 150 First group lens barrel 151 1st group pin 152 1st group unit 160 base A 164 coil 162 terminal pin 163 terminal 165 Positioning plate 166 screws 170 Base B 171 Shutter actuator unit 173 shutter blade A 172 shutter blade B 174 Shutter blade C 175 Opening limit lever 176 axis 177 Aperture limiting spring 178 screws 179 shutter spring 180 Second group lens holder 181 2nd lens group 190 Flexible printed circuit board 200 1A holder 201 1A lens group 210 1B holder 211 1B lens group 212 yoke plate 213 magnet 214 spring 215 Eccentricity adjustment pin 220 1C holder 221 1C lens 222 Shutter PI (Photo interrupter) 223 screw 230 leaf spring A 231 leaf spring B 232, 233, 234, 235 screws 236 1st group Eccentricity adjustment pin A 237 1st group Eccentricity adjustment pin B 238 Isolation Sheet 240 barrier unit 242 barrier blade A 243 Barrier blade B 610 1B holder 611 1B lens group 612 yoke plate 613 magnet 614 spring 615 Eccentricity adjustment pin 710 1B holder 711 1B lens group 712 yoke plate 713 magnet 714 spring 715 Eccentricity adjustment pin

Claims (8)

[Claims] 1. A shake correction device for correcting an image blur by moving an optical element in a direction orthogonal to an optical axis, comprising: a holding member for holding the optical element; and a holding member arranged before and after the holding member in the optical axis direction. A first main body and a second main board that constitute the main body of the apparatus, a plurality of extending portions extending in the direction orthogonal to the optical axis are provided on the outer periphery of the holding member, and the sliding contact integrally formed with the extending portions. A shake correction device, wherein a surface is in slidable contact with the first and second base plates or a member fixed to at least one of these base plates in a direction orthogonal to the optical axis. 2. The shake correction device according to claim 1, wherein the sliding contact surface is formed in a convex curved surface shape. 3. The runout according to claim 1, wherein at least one of the first and second base plates is formed with a convex receiving surface that receives the contact of the sliding contact surface. Correction device. 4. A shutter unit for controlling the amount of passing light is fixed to the first base plate, and a drive unit for applying a driving force to the holding member in the direction orthogonal to the optical axis is fixed to the second base plate. The shake correction apparatus according to claim 1, wherein the shake correction apparatus is provided. 5. The drive means is a coil for generating a thrust force of the holding member in the direction orthogonal to the optical axis when energized, and is formed on the second base plate side of the extending portion of the holding member. The sliding contact surface slidably contacts a positioning plate made of a non-magnetic material for positioning the coil fixed to the second base plate in the optical axis direction. The shake correction apparatus according to 1. 6. An optical apparatus comprising the shake correction device according to claim 1. Description: 7. A guide member for guiding the lens unit movable in the optical axis direction in the optical axis direction, and between the two extending portions of the holding member on the outer periphery of the first and second main plates. A notch-shaped portion is formed in the corresponding portion, and when the lens unit moves in the optical axis direction, the guide member is a space formed between the notch-shaped portion and the device body in a direction orthogonal to the optical axis. The optical device according to claim 6, wherein the optical device passes through the optical device. 8. A aperture limiting unit for limiting an opening aperture of a shutter unit for controlling an amount of passing light, wherein the aperture limiting unit is arranged between two extending portions of the holding member. The optical device according to claim 6.